“On the flight, I saw the propeller stopped,” said Josee Desjardens, of Montreal, while sipping a hot beverage. “I just thought it was slowing down.”

Jerald Bell, who was on his way to Montreal from his home in Connecticut for a business trip, said the right engine quit or was shut down 30 to 40 minutes into the flight. Bell said he thought it was done to conserve fuel.

Linda and Eric Fuller, of Wilbraham, Mass., were on their way to Montreal, where Linda Fuller was scheduled to give a 2 p.m. speech on gender validation in the Olympics.

“We weren’t worried,” she said while working on her laptop. “The captain was very calm.”

Eric Fuller added that no one was paying much attention at the time. “I think we were all dozing a little bit.”

The Federal Aviation Administration issued a statement that the plane made an emergency landing at 8:36 a.m. after experiencing “an engine-related problem.” The FAA said it would conduct an investigation.

The plane was surrounded on the tarmac by several emergency vehicles.

Fire personnel, some dressed in silver protective suits, were seen examining the right engine.

According to the Air Canada website, Flight 7295 departed Bradley International Airport at 7:21 a.m. and was scheduled to land at Pierre Trudeau International Airport at 8:50 a.m. A notation indicated the flight was “diverted.”